def parse_revspec(s: str, ctx_project: Optional[Project] = None) \
-> Tuple[Dataset, Project]:
"""
Parses Revision paths. The syntax is:
- <project path> [ @<rev> ] [ :<target> ]
- <rev> [ :<target> ]
- <target>
The second and the third forms assume an existing "current" project.
Returns: the dataset and the project from the parsed path.
The project is only returned when specified in the revpath.
"""
match = re.fullmatch(r"""
(?P<proj_path>(?: [^@:] | :[/\\] )+)
(@(?P<rev>[^:]+))?
(:(?P<source>.+))?
""",
s,
flags=re.VERBOSE)
if not match:
raise ValueError("Failed to recognize revspec in '%s'" % s)
match = match.groupdict()
proj_path = match["proj_path"]
rev = match["rev"]
source = match["source"]
target_project = None
assert proj_path
if rev:
target_project = load_project(proj_path, readonly=True)
project = target_project
# proj_path is either proj_path or rev or source name
elif Project.find_project_dir(proj_path):
target_project = load_project(proj_path, readonly=True)
project = target_project
elif ctx_project:
project = ctx_project
if project.is_ref(proj_path):
rev = proj_path
elif not source:
source = proj_path
else:
raise ProjectNotFoundError("Failed to find project at '%s'. " \
"Specify project path with '-p/--project' or in the "
"target pathspec." % proj_path)
if target_project:
on_error_do(Project.close, target_project, ignore_errors=True)
tree = project.get_rev(rev)
return tree.make_dataset(source), target_project
def create_command(args):
project_dir = osp.abspath(args.dst_dir)
existing_project_dir = Project.find_project_dir(project_dir)
if existing_project_dir and os.listdir(existing_project_dir):
if args.overwrite:
rmtree(existing_project_dir)
else:
raise CliException("Directory '%s' already exists "
"(pass --overwrite to overwrite)" %
existing_project_dir)
log.info("Creating project at '%s'" % project_dir)
Project.init(project_dir)
log.info("Project has been created at '%s'" % project_dir)
return 0
